K2-98b: A 32 M ⊕ Neptune-Siza Planet in a 10 Day Orbit Transiting an F8 Star
Journal article, 2016

We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M ? = 1.074 ±0.042 M o, R ? = R o, and age of . We derive a planetary mass and radius of M p = 32.2 ±8.1 M ? and R p = R ?. K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in ?3 Gyr, due to the evolution of the latter toward the red giant branch.

planets and satellites: detection

planets and satellites: individual K2-98b (EPIC 211391664b)

stars: fundamental parameters

Author

Oscar Barragán

University of Turin

Sascha Grziwa

University of Cologne

Davide Gandolfi

Landessternwarte Heidelberg

University of Turin

Malcolm Fridlund

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

Michael Endl

The University of Texas at Austin

H. J. Deeg

University of La Laguna

Instituto Astrofisico de Canarias

Manuel P. Cagigal

University of Cantabria

Antonino F. Lanza

Osservatorio Astrofisico di Catania

Pier G Prada Moroni

University of Pisa

Istituto Nazionale Di Fisica Nucleare, Frascati

A. M S Smith

German Aerospace Center (DLR)

Judith Korth

University of Cologne

Megan Bedell

University of Chicago

Juan Cabrera

German Aerospace Center (DLR)

William D. Cochran

The University of Texas at Austin

Felice Cusano

Osservatorio Astronomico Di Bologna

Szilard Csizmadia

German Aerospace Center (DLR)

Philipp Eigmüller

German Aerospace Center (DLR)

Anders Erikson

German Aerospace Center (DLR)

Eike W. Guenther

Thüringer Landessternwarte Tautenburg

Artie P. Hatzes

Thüringer Landessternwarte Tautenburg

David Nespral

Instituto Astrofisico de Canarias

University of La Laguna

Martin Pätzold

University of Cologne

Jorge Prieto-Arranz

University of La Laguna

Instituto Astrofisico de Canarias

Heike Rauer

German Aerospace Center (DLR)

Technische Universität Berlin

Astronomical Journal

0004-6256 (ISSN) 1538-3881 (eISSN)

Vol. 152 6 Art. no. 193- 193

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.3847/0004-6256/152/6/193

More information

Latest update

5/29/2018